Can 2017 returns be efiled

[Tucsonpremium]

I try to efiled a 2017 return and it goes thru the process but it goes back to ready to file without giving me any message

[abctax55]

Nope - that ship sailed last fall.

Only current year, plus two prior.

[IRonMaN]

That ship either sailed or sunk last fall ----------------- depending on how you look at it. 🚢